As a practical matter, it might be a mistake for both him and the network.
In a number of his interviews, he has not come across as a very good extemporaneous speaker. Being on the campaign trial is different from being in an interview situation.
Even if he believes passionately in what he is saying, just a few “um”s and “uhs” and hesitant pauses get tiring for a TV viewer pretty quickly.
[trial = *trail*]